diff options
Diffstat (limited to 'lib/libc/string/strerror.c')
| -rw-r--r-- | lib/libc/string/strerror.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/lib/libc/string/strerror.c b/lib/libc/string/strerror.c new file mode 100644 index 000000000000..922bb0284497 --- /dev/null +++ b/lib/libc/string/strerror.c @@ -0,0 +1,142 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#if defined(NLS) +#include <nl_types.h> +#endif + +#include <limits.h> +#include <errno.h> +#include <string.h> +#include <stdio.h> + +#include <ssp/ssp.h> + +#include "errlst.h" +#include "../locale/xlocale_private.h" +#include "libc_private.h" + +/* + * Define buffer big enough to contain delimiter (": ", 2 bytes), + * 64-bit signed integer converted to ASCII decimal (19 bytes) with + * optional leading sign (1 byte), and a trailing NUL. + */ +#define EBUFSIZE (2 + 19 + 1 + 1) + +/* + * Doing this by hand instead of linking with stdio(3) avoids bloat for + * statically linked binaries. + */ +static void +errstr(int num, const char *uprefix, char *buf, size_t len) +{ + char *t; + unsigned int uerr; + char tmp[EBUFSIZE]; + + t = tmp + sizeof(tmp); + *--t = '\0'; + uerr = (num >= 0) ? num : -num; + do { + *--t = "0123456789"[uerr % 10]; + } while (uerr /= 10); + if (num < 0) + *--t = '-'; + *--t = ' '; + *--t = ':'; + strlcpy(buf, uprefix, len); + strlcat(buf, t, len); +} + +int +__strerror_rl(int errnum, char *strerrbuf, size_t buflen, locale_t locale) +{ + int retval = 0; +#if defined(NLS) + int saved_errno = errno; + nl_catd catd; + + catd = __catopen_l("libc", NL_CAT_LOCALE, locale); +#endif + + if (errnum < 0 || errnum >= __hidden_sys_nerr) { + errstr(errnum, +#if defined(NLS) + catgets(catd, 1, 0xffff, __uprefix), +#else + __uprefix, +#endif + strerrbuf, buflen); + retval = EINVAL; + } else { + if (strlcpy(strerrbuf, +#if defined(NLS) + catgets(catd, 1, errnum, __hidden_sys_errlist[errnum]), +#else + __hidden_sys_errlist[errnum], +#endif + buflen) >= buflen) + retval = ERANGE; + } + +#if defined(NLS) + catclose(catd); + errno = saved_errno; +#endif + + return (retval); +} + +int +__ssp_real(strerror_r)(int errnum, char *strerrbuf, size_t buflen) +{ + return (__strerror_rl(errnum, strerrbuf, buflen, __get_locale())); +} + +char * +strerror_l(int num, locale_t locale) +{ + static _Thread_local char ebuf[NL_TEXTMAX]; + + if (__strerror_rl(num, ebuf, sizeof(ebuf), locale) != 0) + errno = EINVAL; + return (ebuf); +} + +char * +strerror(int num) +{ + static char ebuf[NL_TEXTMAX]; + + if (__strerror_rl(num, ebuf, sizeof(ebuf), __get_locale()) != 0) + errno = EINVAL; + return (ebuf); +} |